1. Local Area Network (LAN)
   • Description: A network limited to a small geographic area, such as a building or a group of buildings. It allows devices to share resources like printers, email, and files.
   • Connections: Typically connected through copper wire or fiber optics.
   • Use Case: Common in businesses, schools, and organizations for internal communication and resource sharing.
2. Campus Area Network (CAN)
   • Description: A network that connects multiple buildings on a campus, such as a university or corporate campus, to a fast backbone network.
   • Connections: Often uses high-speed connections like fiber optics to link different buildings.
3. Metropolitan Area Network (MAN)
   • Description: A network that extends over a city or a metropolitan area, connecting multiple LANs across a wider geographic region.
   • Use Case: Used to connect different branches of a company within a city or to provide high-speed internet services to a metropolitan area.
4. Wide Area Network (WAN)
   • Description: A network that connects LANs over large geographical areas, such as cities, states, or even countries.
   • Use Case: Enables communication and data sharing across long distances, often using leased lines, satellite links, or the internet.
5. Internet, Intranet, and Extranet
   • Internet: A global network accessible to anyone with the proper devices and connections. It connects millions of private, public, academic, business, and government networks.
   • Intranet: A private network accessible only to an organization’s staff, designed to share company information and computing resources within the organization.
   • Extranet: A controlled private network allowing external partners, vendors, and clients to access certain parts of an organization’s intranet, but not the entire network.

These network types define the scope and purpose of different network configurations, ranging from small, localized setups to global connections.